Would you sue Yahoo for violating your trademark?
 

Yahoo is using my domain name (which has been a registered trademark since 1996) in Google adwords. When I type in my domain in Google, both Yahoo and True.com show up in adwords as:

www mydomain com
Find Love With Yahoo! Personals.
Create a Free Profile Now.
personals.yahoo.com

Www mydomain com
Browse photos, Millions of Users
Jump Start Your Love Life, aff
www.true.com


So, should I spend the thousands in Attorney fees to sue?

You have to make some sort of noise, otherwise it can invalidate your trademark.